Color Alert High And Low Alarm Feature; Temperature Units; Lock Feature; Battery Replacement - Extech Instruments 42509 User Manual

Dual laser infrared (ir) thermometer with color alert
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Color Alert High and Low Alarm Feature

The meter has a programmable high and low alarm feature. When either alarm point is
reached the meter will alert the user via a flashing red LED backlight, as well as an audible
beep and a blinking LCD display icon. The alarm limit is set and the feature is
enabled/disabled using the MODE button. The setting is stored and memory and will
remain as the "turn-on" condition until changed.

Temperature Units

The temperature units can be set to °F or °C using the switch located in the battery
compartment.

Lock feature

The LOCK feature disables the Auto Power Off feature for a single period of use after the
Lock mode is selected. The feature is useful for long term temperature monitoring and
hands free use. The meter will revert to auto power off if the trigger is pressed during a
locked scan.
Over-range Indication
If the temperature measurement exceeds the specified temperature range, the
thermometer will display dashes in place of a temperature reading.

Battery Replacement

When the low battery symbol
meter's battery (9V). The battery compartment is located behind the
panel that surrounds the meter's trigger. Open the compartment by
pulling the panel down from the trigger area. Replace the 9V battery
and close the battery compartment cover.
appears on the display, replace the
6
42509 V1.0 07/09

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